Naughty Nurses, Rena Kodama

Rena cares for her aging father-in-law, whose life is short. Having always been close to her grandfather, caregiving is not a burden for Rena, but a precious form of communication with her father-in-law. Her husband, displeased with their close relationship, schemes to separate them. However, Rena's feelings for her father-in-law only grow stronger, and she eventually begins to actively tend to his intimate care in secret from her husband. Gradually, the two become lovers, indulging in kisses and caresses more passionate than those with her husband, and they spend their days and nights entwined together...